stupid question but i have an 08 nytro rtx just got the lower ball joints done by the dealer asked about the uppers but they really wouldnt tell me anything via reliability reasons. anyways i was thinking about either machining the uppers an if i do so i machine off the stem not the actuall ball right? Or should i just buy new ones an if i do machine it wont hurt anything in the way they seat or move. i just put a set of slydogs on an want to get this handling down any help please thank you. 
